;(function ($, window, document, undefined) {
  'use strict'

  var defaults = {
    thumbnail: true,

    animateThumb: true,
    currentPagerPosition: 'middle',

    thumbWidth: 100,
    thumbContHeight: 100,
    thumbMargin: 5,

    exThumbImage: false,
    showThumbByDefault: true,
    toogleThumb: true,
    pullCaptionUp: true,

    enableThumbDrag: true,
    enableThumbSwipe: true,
    swipeThreshold: 50,

    loadYoutubeThumbnail: true,
    youtubeThumbSize: 1,

    loadVimeoThumbnail: true,
    vimeoThumbSize: 'thumbnail_small',

    loadDailymotionThumbnail: true,
  }

  var Thumbnail = function (element) {
    // get tangibleGlider core plugin data
    this.core = $(element).data('tangibleGlider')

    // extend module default settings with tangibleGlider core settings
    this.core.s = $.extend({}, defaults, this.core.s)

    this.$el = $(element)
    this.$thumbOuter = null
    this.thumbOuterWidth = 0
    this.thumbTotalWidth =
      this.core.$items.length *
      (this.core.s.thumbWidth + this.core.s.thumbMargin)
    this.thumbIndex = this.core.index

    // Thumbnail animation value
    this.left = 0

    this.init()

    return this
  }

  Thumbnail.prototype.init = function () {
    var _this = this
    if (this.core.s.thumbnail && this.core.$items.length > 1) {
      if (this.core.s.showThumbByDefault) {
        setTimeout(function () {
          _this.core.$outer.addClass('tglider-thumb-open')
        }, 700)
      }

      if (this.core.s.pullCaptionUp) {
        this.core.$outer.addClass('tglider-pull-caption-up')
      }

      this.build()
      if (this.core.s.animateThumb) {
        if (
          this.core.s.enableThumbDrag &&
          !this.core.isTouch &&
          this.core.doCss()
        ) {
          this.enableThumbDrag()
        }

        if (
          this.core.s.enableThumbSwipe &&
          this.core.isTouch &&
          this.core.doCss()
        ) {
          this.enableThumbSwipe()
        }

        this.thumbClickable = false
      } else {
        this.thumbClickable = true
      }

      this.toogle()
      this.thumbkeyPress()
    }
  }

  Thumbnail.prototype.build = function () {
    var _this = this
    var thumbList = ''
    var vimeoErrorThumbSize = ''
    var $thumb
    var html =
      '<div class="tglider-thumb-outer">' +
      '<div class="tglider-thumb group">' +
      '</div>' +
      '</div>'

    switch (this.core.s.vimeoThumbSize) {
      case 'thumbnail_large':
        vimeoErrorThumbSize = '640'
        break
      case 'thumbnail_medium':
        vimeoErrorThumbSize = '200x150'
        break
      case 'thumbnail_small':
        vimeoErrorThumbSize = '100x75'
    }

    _this.core.$outer.addClass('tglider-has-thumb')

    _this.core.$outer.find('.lg').append(html)

    _this.$thumbOuter = _this.core.$outer.find('.tglider-thumb-outer')
    _this.thumbOuterWidth = _this.$thumbOuter.width()

    if (_this.core.s.animateThumb) {
      _this.core.$outer.find('.tglider-thumb').css({
        width: _this.thumbTotalWidth + 'px',
        position: 'relative',
      })
    }

    if (this.core.s.animateThumb) {
      _this.$thumbOuter.css('height', _this.core.s.thumbContHeight + 'px')
    }

    function getThumb(src, thumb, index) {
      if (!src) return
      var isVideo = _this.core.isVideo(src, index) || {}
      var thumbImg
      var vimeoId = ''

      if (isVideo.youtube || isVideo.vimeo || isVideo.dailymotion) {
        if (isVideo.youtube) {
          if (_this.core.s.loadYoutubeThumbnail) {
            thumbImg =
              '//img.youtube.com/vi/' +
              isVideo.youtube[1] +
              '/' +
              _this.core.s.youtubeThumbSize +
              '.jpg'
          } else {
            thumbImg = thumb
          }
        } else if (isVideo.vimeo) {
          if (_this.core.s.loadVimeoThumbnail) {
            // vimeoErrorThumbSize
            thumbImg = `//i.vimeocdn.com/video/error_${640}.jpg`
            vimeoId = isVideo.vimeo[1]
          } else {
            thumbImg = thumb
          }
        } else if (isVideo.dailymotion) {
          if (_this.core.s.loadDailymotionThumbnail) {
            thumbImg =
              '//www.dailymotion.com/thumbnail/video/' + isVideo.dailymotion[1]
          } else {
            thumbImg = thumb
          }
        }
      } else {
        thumbImg = thumb
      }

      thumbList +=
        '<div data-vimeo-id="' +
        vimeoId +
        '" class="tglider-thumb-item" style="width:' +
        _this.core.s.thumbWidth +
        'px; margin-right: ' +
        _this.core.s.thumbMargin +
        'px"><div class="tglider-thumb-item-image-wrap" align="center"><img src="' +
        thumbImg +
        '" /></div></div>'
      vimeoId = ''
    }

    if (_this.core.s.dynamic) {
      for (var i = 0; i < _this.core.s.dynamicEl.length; i++) {
        getThumb(
          _this.core.s.dynamicEl[i].src,
          _this.core.s.dynamicEl[i].thumb,
          i
        )
      }
    } else {
      _this.core.$items.each(function (i) {
        if (!_this.core.s.exThumbImage) {
          getThumb(
            $(this).attr('href') ||
              $(this).attr('data-src') ||
              $(this).find('a').attr('href'),
            $(this).find('img').attr('src'),
            i
          )
        } else {
          getThumb(
            $(this).attr('href') ||
              $(this).attr('data-src') ||
              $(this).find('a').attr('href'),
            $(this).attr(_this.core.s.exThumbImage),
            i
          )
        }
      })
    }

    _this.core.$outer.find('.tglider-thumb').html(thumbList)

    $thumb = _this.core.$outer.find('.tglider-thumb-item')

    // Load vimeo thumbnails
    $thumb.each(function () {
      var $this = $(this)
      var vimeoVideoId = $this.attr('data-vimeo-id')

      if (vimeoVideoId) {
        $.getJSON(
          '//www.vimeo.com/api/v2/video/' + vimeoVideoId + '.json?callback=?',
          {
            format: 'json',
          },
          function (data) {
            $this.find('img').attr('src', data[0][_this.core.s.vimeoThumbSize])
          }
        )
      }
    })

    // manage active class for thumbnail
    $thumb.eq(_this.core.index).addClass('active')
    _this.core.$el.on('onBeforeSlide.lg.tm', function () {
      $thumb.removeClass('active')
      $thumb.eq(_this.core.index).addClass('active')
    })

    $thumb.on('click.lg touchend.lg', function () {
      var _$this = $(this)
      setTimeout(function () {
        // In IE9 and bellow touch does not support
        // Go to slide if browser does not support css transitions
        if (
          (_this.thumbClickable && !_this.core.lgBusy) ||
          !_this.core.doCss()
        ) {
          _this.core.index = _$this.index()
          _this.core.slide(_this.core.index, false, true)
        }
      }, 50)
    })

    _this.core.$el.on('onBeforeSlide.lg.tm', function () {
      _this.animateThumb(_this.core.index)
    })

    $(window).on('resize.lg.thumb orientationchange.lg.thumb', function () {
      setTimeout(function () {
        _this.animateThumb(_this.core.index)
        _this.thumbOuterWidth = _this.$thumbOuter.width()
      }, 200)
    })
  }

  Thumbnail.prototype.setTranslate = function (value) {
    // jQuery supports Automatic CSS prefixing since jQuery 1.8.0
    this.core.$outer.find('.tglider-thumb').css({
      transform: 'translate3d(-' + value + 'px, 0px, 0px)',
    })
  }

  Thumbnail.prototype.animateThumb = function (index) {
    var $thumb = this.core.$outer.find('.tglider-thumb')
    if (this.core.s.animateThumb) {
      var position
      switch (this.core.s.currentPagerPosition) {
        case 'left':
          position = 0
          break
        case 'middle':
          position = this.thumbOuterWidth / 2 - this.core.s.thumbWidth / 2
          break
        case 'right':
          position = this.thumbOuterWidth - this.core.s.thumbWidth
      }
      this.left =
        (this.core.s.thumbWidth + this.core.s.thumbMargin) * index -
        1 -
        position
      if (this.left > this.thumbTotalWidth - this.thumbOuterWidth) {
        this.left = this.thumbTotalWidth - this.thumbOuterWidth
      }

      if (this.left < 0) {
        this.left = 0
      }

      if (this.core.lGalleryOn) {
        if (!$thumb.hasClass('on')) {
          this.core.$outer
            .find('.tglider-thumb')
            .css('transition-duration', this.core.s.speed + 'ms')
        }

        if (!this.core.doCss()) {
          $thumb.animate(
            {
              left: -this.left + 'px',
            },
            this.core.s.speed
          )
        }
      } else {
        if (!this.core.doCss()) {
          $thumb.css('left', -this.left + 'px')
        }
      }

      this.setTranslate(this.left)
    }
  }

  // Enable thumbnail dragging and swiping
  Thumbnail.prototype.enableThumbDrag = function () {
    var _this = this
    var startCoords = 0
    var endCoords = 0
    var isDraging = false
    var isMoved = false
    var tempLeft = 0

    _this.$thumbOuter.addClass('tglider-grab')

    _this.core.$outer
      .find('.tglider-thumb')
      .on('mousedown.lg.thumb', function (e) {
        if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
          // execute only on .tglider-object
          e.preventDefault()
          startCoords = e.pageX
          isDraging = true

          // ** Fix for webkit cursor issue https://code.google.com/p/chromium/issues/detail?id=26723
          _this.core.$outer.scrollLeft += 1
          _this.core.$outer.scrollLeft -= 1

          // *
          _this.thumbClickable = false
          _this.$thumbOuter
            .removeClass('tglider-grab')
            .addClass('tglider-grabbing')
        }
      })

    $(window).on('mousemove.lg.thumb', function (e) {
      if (isDraging) {
        tempLeft = _this.left
        isMoved = true
        endCoords = e.pageX

        _this.$thumbOuter.addClass('tglider-dragging')

        tempLeft = tempLeft - (endCoords - startCoords)

        if (tempLeft > _this.thumbTotalWidth - _this.thumbOuterWidth) {
          tempLeft = _this.thumbTotalWidth - _this.thumbOuterWidth
        }

        if (tempLeft < 0) {
          tempLeft = 0
        }

        // move current slide
        _this.setTranslate(tempLeft)
      }
    })

    $(window).on('mouseup.lg.thumb', function () {
      if (isMoved) {
        isMoved = false
        _this.$thumbOuter.removeClass('tglider-dragging')

        _this.left = tempLeft

        if (Math.abs(endCoords - startCoords) < _this.core.s.swipeThreshold) {
          _this.thumbClickable = true
        }
      } else {
        _this.thumbClickable = true
      }

      if (isDraging) {
        isDraging = false
        _this.$thumbOuter
          .removeClass('tglider-grabbing')
          .addClass('tglider-grab')
      }
    })
  }

  Thumbnail.prototype.enableThumbSwipe = function () {
    var _this = this
    var startCoords = 0
    var endCoords = 0
    var isMoved = false
    var tempLeft = 0

    _this.core.$outer.find('.tglider-thumb').on('touchstart.lg', function (e) {
      if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
        e.preventDefault()
        startCoords = e.originalEvent.targetTouches[0].pageX
        _this.thumbClickable = false
      }
    })

    _this.core.$outer.find('.tglider-thumb').on('touchmove.lg', function (e) {
      if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
        e.preventDefault()
        endCoords = e.originalEvent.targetTouches[0].pageX
        isMoved = true

        _this.$thumbOuter.addClass('tglider-dragging')

        tempLeft = _this.left

        tempLeft = tempLeft - (endCoords - startCoords)

        if (tempLeft > _this.thumbTotalWidth - _this.thumbOuterWidth) {
          tempLeft = _this.thumbTotalWidth - _this.thumbOuterWidth
        }

        if (tempLeft < 0) {
          tempLeft = 0
        }

        // move current slide
        _this.setTranslate(tempLeft)
      }
    })

    _this.core.$outer.find('.tglider-thumb').on('touchend.lg', function () {
      if (_this.thumbTotalWidth > _this.thumbOuterWidth) {
        if (isMoved) {
          isMoved = false
          _this.$thumbOuter.removeClass('tglider-dragging')
          if (Math.abs(endCoords - startCoords) < _this.core.s.swipeThreshold) {
            _this.thumbClickable = true
          }

          _this.left = tempLeft
        } else {
          _this.thumbClickable = true
        }
      } else {
        _this.thumbClickable = true
      }
    })
  }

  Thumbnail.prototype.toogle = function () {
    var _this = this
    if (_this.core.s.toogleThumb) {
      _this.core.$outer.addClass('tglider-can-toggle')
      _this.$thumbOuter.append(
        '<span class="tglider-toogle-thumb tglider-icon"></span>'
      )
      _this.core.$outer
        .find('.tglider-toogle-thumb')
        .on('click.lg', function () {
          _this.core.$outer.toggleClass('tglider-thumb-open')
        })
    }
  }

  Thumbnail.prototype.thumbkeyPress = function () {
    var _this = this
    $(window).on('keydown.lg.thumb', function (e) {
      if (e.keyCode === 38) {
        e.preventDefault()
        _this.core.$outer.addClass('tglider-thumb-open')
      } else if (e.keyCode === 40) {
        e.preventDefault()
        _this.core.$outer.removeClass('tglider-thumb-open')
      }
    })
  }

  Thumbnail.prototype.destroy = function () {
    if (this.core.s.thumbnail && this.core.$items.length > 1) {
      $(window).off(
        'resize.lg.thumb orientationchange.lg.thumb keydown.lg.thumb'
      )
      this.$thumbOuter.remove()
      this.core.$outer.removeClass('tglider-has-thumb')
    }
  }

  $.fn.tangibleGlider.modules.Thumbnail = Thumbnail

})(jQuery, window, document)
